US Customs and Border Protection biometric security checks at Washington Dulles International Airport has intercepted a second impostor trying to enter the US in just its third week of operation.

A 26-year-old woman, who arrived on a flight from Accra, Ghana Saturday morning, presented a U.S. passport to a CBP officer for admission as a returning citizen. Utilizing the new facial comparison technology, the CBP officer established that the traveler was not a match to the passport and referred her for further examination. A secondary examination confirmed that the traveler was a Ghanaian citizen and an impostor to the U.S. passport.

CBP is withholding the woman’s name while an investigation continues.

Posing as someone else when attempting to enter the United States is a serious violation of U.S. immigration law that could result in criminal prosecution. Inadmissible criminals and other foreign nationals routinely attempt various means to enter the United States, and may use stolen, purchased or “borrowed” passports.

“Customs and Border Protection’s facial comparison system is highly effective and efficient at detecting impostors,” said Casey Durst, CBP’s Director of the Baltimore Field Office. “CBP’s facial comparison system has a match rate of 99% making it extremely difficult for criminals, terrorists or impostors to enter the country using another person’s identification and travel documents. This is just one of many ways in which CBP is working to enhance the security of the U.S. while at the same time designing travel processes that are more efficient for the average person.”